Deep desulfurization of transportation fuels is receiving increasing attention in theresearch community worldwide due to increasingly stringent regulations and fuelspecifications in many countries for environmental protection purpose. The traditionalhydrodesulfurization process (HDS) is highly efficient in removing thiols and sulfides, but itis less effective for thiophenes and thiophene derivatives. Ultra-deep desulfurization isbecoming even more formidable challenge for HDS with the decreasing lower sulfur in fuels.Therefore, non-hydrodesulfurization technique of liquid fuels has caused intensive concernsfor ultra-deep desulfurization. Recently, the adsorption desulfurization technique and catalyticoxidation-adsorption desulfurization technique have drawn much attention at home andabroad due to its mild reaction condition,low production cost and little environmentalpollutioz. This thesis focuses on the researches of application of activated carbon fiber inadsorption and oxidation-adsorption removal of thiophenic sulfur compounds from oils.activated carbon suppliers canadahttps://www.yrdcarbon.com/products/
ln the first part of the thesis, the capability of activated carbon fiber (ACF) treated bydifferent kinds of acids for adsorption removal of thiophenic sulfur compounds was evaluatedin the batch-type adsorption process. The results show that the as-received ACF adsorbent,efficiently adsorbs the bigger size sulfur compounds, and the removal efficiency for the sulfurcompounds follows in the order of 4,6-DMDBT > DBT > BT > T. Effect of treatmenttemperature and time by SN acid (ratio of volume of H,SO4 to HNO, is 3:1) on ACFadsorption removal of thiophenic sulfur compounds was studied.The results show thatoxidation with SN acid at room temperature can remove the ashes or inorganic components ofthe ACF adsorbent as well as change in the surface chemistry，introduce theoxygen-containing functional groups such as carboxyl and hydroxyl, improve the adsorptioncapability of ACF for removal of thiophenic sulfur compounds.The kinetic data are consistent with the quasi-second-order kinetic model, which can more accurately describe the adsorption process of methylene blue on activated carbon.
The prepared activated carbon can effectively adsorb and remove mhttps://www.yrdcarbon.com/news/coconut-shell-activated-carbon-for-gold-recovery.htmlethylene blue solution in different concentration range in aqueous solution, and the removal effect is better, which is a kind of adsorbent with development potential.
In activated carbon adsorption characteristics of mercury in flue gas of experiments, the experimental results show that: the preparation of activated carbon and commercial activated carbon has the same ability to mercury, commercial activated carbon on mercury adsorption efficiency was 53.5%, the biggest physical activation, the preparation of activated carbon on mercury adsorption efficiency was 47.5%, the largest chemical activation of the activated carbon prepared by the biggest adsorption efficiency for the mercury is 57.64%.
According to the above experimental results, biomass is an ideal raw material for the preparation of activated carbon, and the prepared activated carbon is an adsorbent with development potential.
By comprehensive comparison between physical activation method and chemical activation method, the activated carbon prepared by physical activation method has better economic benefit and environmental protection value.